package operation;

import book.Book;
import book.BookList;

import java.util.Scanner;

public class DelOperation implements IOPeration{
    @Override
    public void work(BookList bookList) {
        System.out.println("删除图书...");
        System.out.println("请输入你要删除的图书：");
        Scanner scanner = new Scanner(System.in);
        String name = scanner.nextLine();

        int index = -1;
        int currentSize = bookList.getUsedSize();
        for (int i = 0; i < currentSize; i++) {
            Book book = bookList.getBook(i);
            if(book.getName().equals(name)){
                index = i;
                break;
            }
        }
        if(index == -1){
            System.out.println("没有找到这本书");
            return;
        }
        for (int j = index; j < currentSize - 1; j++) {
//            bookList[j] = bookList[j + 1];
            Book book = bookList.getBook(j + 1);
            bookList.setBook(j,book);
        }
        System.out.println("删除图书成功");
        bookList.setUsedSize(currentSize - 1);
    }
}
